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Finding the Fourth Proportional to 3,157.67, 4,731.27 and 1,921.34

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Solution

The fourth proportional to 3,157.67, 4,731.27 and 1,921.34 is: 2,878.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,157.67 : 4,731.27 = 1,921.34 : x
  2. Step 2: Convert to fraction form
    3,157.67/4,731.27 = 1,921.34/x
  3. Step 3: Cross multiply
    3,157.67x = 4,731.27 × 1,921.34
  4. Step 4: Simplify right side
    3,157.67x = 9,090,378.30
  5. Step 5: Solve for x
    x = 9,090,378.30/3,157.67
  6. Step 6: Final answer
    x = 2,878.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.